function rev2calc(radius, strut, A, B, struta, strutb) {
	if(document.revform.strut.value == null || document.revform.strut.value <= 0){
		alert("Strut Length must be a positive value");
              return} 
      if(document.revform.choose.value == "A") {
	    radius = document.revform.strut.value/.61803
		}
	  else {
	    radius = document.revform.strut.value/.54653
       }	
		 
		document.result.struta.value = radius*.61803
        document.result.struta.value = document.result.struta.value.substring(0,6)
        
        document.result.strutb.value = radius*.54653
        document.result.strutb.value = document.result.strutb.value.substring(0,6)        
		
		document.result.radius.value = radius
		document.result.radius.value = document.result.radius.value.substring(0,7)
return   
}